I was scouting around the internet the other day, looking for taillights for an older Airstream I was doing some work on, and I found these replacement lights for the old #99 lights. While lenses are available, the assemblies are not (at least not yet). And they're pretty inexpensive, too.

I am very happy with the result of the conversion on my coach. The added visibility is fantastic. One observation that I will make is that these tail light units appear to have several more LEDs per assembly than the earlier design that I have on my coach.